package com.lzx.demo.work4;

/**
 * @author 程序员星星
 * @date 2023/4/13
 * @Description
 */
public class MobilePhone {
    public SIM sim;

    public void useSIM(SIM card) {
        sim = card;
    }

    public void open() {
        System.out.println(666);
    }
}
